Physical-chemical and microbiological analysis of rainwater used for consumption of stored in reservoirs the rural area in the municipality of condeúba

This work presents results obtained from the determination of physicochemical and microbiological parameters.stormwater used for human consumption. Eight rainwater samples were collected from reservoirs located in rural areas of the city of Condeúba located in the southwestern region of the state of Bahia. The objective of this work was to evaluate and compare the results obtained by the analysis with the maximum values allowed according to the Consolidation Ordinance No. 5/2017 Annex XX of the Ministry of Health, which deals with the quality of drinking water and its standard. of potability. The results obtained from the pH analysis ranged from 4.38 to 8.07 with an average of 6.49; hardness ranged from 26.8 mg / L to 106.4 mg / L, with an average of 48.1 mg / L; electrical conductivity ranged from 10.8 to 146.9 µS / cm, with an average of 79.96 µS / cm; turbidity ranged from 0.35 to 8.18 UNT, with an average of 1.70 UNT; alkalinity ranged from 13.4 mg / L CaCO3 to 61.4 mg / L CaCO3 with an average / total alkalinity of 39.8 mg / L CaCO3; resistivity ranged from 8.8K Ωm to 22.6K Ωm with an average of 12.82K Ωm; total solids ranged from 5.46 mg / L to 51.8 mg / L with an average of 35.44 mg / L; Regarding the results obtained from the microbiological analysis, in the eight samples evaluated it was possible to observe the presence of total coliforms as well as Escherichia coli absent in only one of the samples.